neutral safety switch.

I took my slant 6 (225) and transmission out to detail the engine compartment of my 67 Dart GT a few moths ago. I installed a new headlight/engine harness as well. Now it's time to get is started again & I can't locate the harness from the switch on the transmission to the main harness. I've forgotten the routing. The new harness is great. It hooks up at all the right connections including the starter relay.
Help please?